From a friend tonight:

"Just thought you might all be interested in this WMV HD demo of the next version of Far Cry.  The realism is above anything else I’ve seen in gaming…"

http://media.pc.gamespy.com/media/694/694190/vids_1.html - it’s the left clip; select the 1280x720 WMV option. 

One word: Outstanding.

Know of any other outstanding trailers in WMV-HD?  Let me know- personally I like the upcoming Miami Vice trailer in WMV HD (58MB of teaser goodness)